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Net Loss per Common Share (Tables)
9 Months Ended
Sep. 30, 2019
Net Loss per Common Share [Abstract]  
Schedule of company's potential anti dilutive securities

 

 

 

 

 

 

 

September 30, 

 

September 30, 

 

    

2018

    

2019

Stock options

 

836,849

 

2,266,017

Convertible preferred stock

 

1,698

 

1,698

Series A preferred stock

 

132,000

 

132,000

Common stock warrants

 

7,490,500

 

7,490,500

Total shares excluded from calculation

 

8,461,048

 

9,890,215